Question

$\sqrt{1 - \frac{x}{9} } = \frac{2}{3}$
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Answer 1

Squarying both sides --

1 - x/9 = 4/9

1 - 4/9 = x / 9

5/9 = x/9

x = 5 Ans.

Answer 2

Hi !!

13 is your answer

Hope this helps